Hello everyone, I am new to this forum and luxury watches in general. I believe that my first serious watch purchase after 45 years on this Earth will be a Speedmaster. I thought that I've decided on a Professional, but now after looking at some Mark 40's on the bay, I'm not so sure. Unfortunatly I'm not finding a lot of information on the MK40 and didn't know if that's because it's rare or if members here have just avoided it. Either way I look forward to any response and recommendation. Thank you in advance!